Vapor-Liquid Equilibria for the 1,1-Difluoroethane (HFC-152a) + Propane (R-290) System

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• 作者：Youngmoo Park ; Junone Kang ; Jungwon Choi ; Jaisu k Yoo ; Hyunjung Kim
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2007
• 出版时间：July 2007
• 年：2007
• 卷：52
• 期：4
• 页码：1203 - 1208
• 全文大小：150K
• 年卷期：v.52,no.4(July 2007)
• ISSN：1520-5134

文摘

Isothermal vapor-liquid equilibrium data of the binary system 1,1-difluoroethane (HFC-152a) + propane (R-290) were measured in the temperature range from 273.15 K to 313.15 K at 10 K intervals and in the compositionrange from 0.2 to 0.8 mole fraction of propane. The temperature, pressure, and compositions of the liquid andvapor phases were measured with a circulation-type apparatus. The experimental data were correlated with theCarnahan-Starling-De Santis, Peng-Robinson, and Redlich-Kwong-Soave equations of state. Azeotropicbehavior was revealed near 0.73 mole fraction of propane. The vapor pressure of the azeotropic system wascompared with those of chlorodifluoroethane (HCFC-22) and the zeotropic mixture of difluoroethane (HFC-32)+ pentafluoroethane (HFC-125) (50-50) (alternative refrigerant blend R-410A), the zeotropic mixture of HFC-32 + HFC-125 + 1,1,1,2-tetrafluoroethane (HFC-134a) (23-25-52) (alternative refrigerant blend R-407C),dichlorodifluoromethane (HCFC-12), and HFC-134a. It was found that the vapor pressure of the azeotropic systemwas very close to that of HCFC-22. This azeotropic system has good potential to replace the use of HCFC-22 asa refrigerant.